guest; visitor — a polite way to refer to someone visiting a home or place.
お客様がお見えになりましたので、応接室へどうぞ。
A guest has arrived; please go to the reception room.
ホテルではお客様の安全が最優先です。
In hotels, the safety of guests is the top priority.
お客様のお名前をお伺いしてもよろしいですか。
May I ask for the guest's name?
customer; client; passenger; spectator — a respectful term used by businesses or services for people who use or buy their services/products.
お客様、ご注文の商品はこちらでございます。
Customer, here is the product you ordered.
お客様からのご意見はサービス改善に役立ちます。
Customer feedback helps improve services.
観光バスはお客様を主要駅で降ろした。
The tour bus dropped off the passengers at the main station.